Duplicate-field warning text is truncated on project creation

[IvaKuklica]

Description:
When creating a new project, if a user adds a field with the same name as an existing field, the duplicate-field warning message is truncated and cannot be read in full.

Environment:
Staging

Application (app version / build / OS):
App: Mergin Maps Mobile (Android)
App version: 2026.1.1 (build 776151)
Device/OS: Samsung Galaxy A53 5G / Android 15

Steps to reproduce:

1. Go to the project creation screen.
2. Add one or more custom fields.
3. Add another field with the same name as an existing field.
4. Observe the duplicate-field validation/warning message that appears at the top of the screening section.

Actual results:
The duplicate-field warning appears, but the text is truncated (cut off) and the user cannot read the full message explaining the problem.

Expected results:
The full warning message should be visible and readable (no clipping).

Screen-record:

Screen_Recording_20260309_085849.mp4

[IvaKuklica]

Another issue is when multiple fields with the same name are added, the error message may not appear at the top of the screen at all. The duplicate-field warning message is displayed for 5 seconds (approximately) and if user does not confirm an action within that time, the warning message disappears and user is not informed, that the field with the same name will be not added to the project.

Screen_Recording_20260309_155459.mp4